Your present determines your future, correct?
Influences, yes. Determines, no.
Therefore it is highly relevant if your present is determined entirely by your past. I would say that if ones present, and therefore personality, reactions ectcetera is entirely out of ones control, by extension ones actions (and therefore future) are entirely out of ones control.
If A, then B, yes, I agree. However, A is false.
Take the following analogy:
A ball starts moving. It travels on a perfectly straight line. It hits another ball. Momentum and energy are transferred according to set physical laws. The second ball begins motion, it hits a beeper after about three feet. An alarm goes off.
I have two responses:
#1, a ball hardly qualifies as "alive," and I think there is sufficient distinction between the living and the non-living to assume that they behave differently.
#2, if you zoom in close enough to the ball, you will find particles whizzing around in a fashion that can easily be described as "chaos." It is only when you take trillions of such "chaotic" particles, that the law of averages creates behavior that seems orderly.
In this scenario, did the second ball have any leeway in whether it hit the beeper or not?
Yes, it had
some leeway, though that leeway is infinitesimal enough to be equivalent to zero. It's certainly possible that if you repeat the experiment a million times, you will find results that are off by distances perhaps as great as a millimeter. Again, if you take trillions of random events, all subject to similar "influences," those influences will, by the law of averages, create a predictable result.
I would argue that animals, by virtue of having a nervous system, allow "random" (i.e. non-deterministic) events to propagate themselves throughout an entire system, allowing the system as a whole to override the law of averages, and follow "will" instead. That is why an animal can behave differently than, for example, a stone. The laws of gravity and inertia assert that things flow downhill, yet a creature can climb to the top of that hill in defiance of these laws.